drm/i915/bxt: Avoid early timeout during PLL enable

Since wait_for_atomic doesn't re-check the wait-for condition after
expiry of the timeout it can fail when called from non-atomic context
even if the condition is set correctly before the expiry. Fix this by
using the non-atomic wait_for instead.

I noticed this via the PLL locking timing out incorrectly, with this fix
I couldn't reproduce the problem.

Fixes: 0351b93992aa ("drm/i915: Do not lie about atomic timeout granularity")
CC: Chris Wilson <[email protected]>
CC: Tvrtko Ursulin <[email protected]>
Signed-off-by: Imre Deak <[email protected]>
Reviewed-by: Tvrtko Ursulin <[email protected]>
CC: [email protected]
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit 0b786e41c73956126f6297764459021deef8aba7)
Signed-off-by: Jani Nikula <[email protected]>

0 files changed, 0 insertions, 0 deletions